Modify the roth conversion logic and simplify the code around that.
-rw-r--r-- 15 .gitignore
-rw-r--r-- 15673 accounts.py
-rw-r--r-- 648 constants.py
-rw-r--r-- 7110 parameters.py
-rwxr-xr-x 13587 retire.py
-rw-r--r-- 38 secrets.py
-rw-r--r-- 2666 tax_brackets.py
-rw-r--r-- 4598 tax_collector.py
-rw-r--r-- 350 utils.py